My Inquiry
My Account
Texas Instruments TPS61235RWLT
- Part No.:
- TPS61235RWLT
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
TPS61235RWLT.pdf
- Description:
- IC REG BOOST 5.1V 6.5A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,811
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS61235RWLT from Texas Instruments is a fixed 5.1-V, 8-A valley-current-mode synchronous boost converter optimized for single-cell Li-ion/Li-polymer battery-powered USB power delivery applications. It integrates dual 14-mΩ/14-mΩ MOSFETs, delivers up to 3.5 A at 3.3 V → 5 V conversion with 97% peak efficiency, and features programmable constant output current, true input-output disconnection in shutdown, and 10-µA quiescent current under light load.
For engineers reviewing the TPS61235RWLT datasheet, TPS61235RWLT pinout, TPS61235RWLT application, or TPS61235RWLT equivalent, this page provides verified technical context, validated pin functions, confirmed constant-current programming behavior, real-world efficiency curves across 2.7–4.2 V input, and direct alternative part comparisons for USB Type-C power bank and portable device designs.
Technical Context
The TPS61235RWLT implements a quasi-constant on-time valley-current-mode control architecture with automatic PWM-to-PFM transition at light load. Its dual regulation loops-voltage (CV) and current (CC)-enable seamless handoff between 5.1-V fixed-output regulation and externally resistor-programmed constant-current mode (e.g., 2 A via 61.9-kΩ at CC pin).
It integrates a bootstrap gate driver for the high-side rectifier, internal soft-start with pre-charge current limiting (0.05–1.7 A depending on VOUT), and protection features including cycle-by-cycle valley-current limit (6.5–9.5 A), overvoltage lockout (5.6–5.93 V), thermal shutdown (140°C), and reverse-current blocking during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.1 V ±1.96% (5.0–5.2 V in PWM mode); enables direct USB 5-V compliance without external feedback resistors. |
| Max Output Current | 3.5 A at 3.3 V → 5 V conversion; supports full-power USB charging of smartphones and peripherals. |
| Peak Efficiency | 97% at 3.6 V input / 2 A load; minimizes thermal dissipation in compact power bank PCB layouts. |
| Switching Frequency | 1 MHz nominal (750–1250 kHz range); allows use of small 0.7–1.3 µH inductors and low-ESR ceramic capacitors. |
| Quiescent Current | 10 µA at no load; sustains "Always-On" status reporting (via INACT pin) without draining battery standby time. |
| Shutdown Current | <1 µA; ensures near-zero battery drain when disabled, critical for long-term storage of portable devices. |
| Internal FET RDS(on) | 14 mΩ high-side + 14 mΩ low-side; reduces conduction loss and enables high-current capability in 2.5 × 2.5 mm footprint. |
Pinout & Package
TPS61235RWLT is housed in a thermally enhanced 9-pin VQFN package (RWLT suffix), measuring 2.5 mm × 2.5 mm × 0.8 mm with exposed thermal pad (PGND-connected). The package supports high-density layout and efficient heat transfer to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground reference | Low-impedance return path for high-switching-current loops; must be connected directly to thermal pad and solid ground plane. |
| SW (Pin 2) | Boost switch node | Connects to inductor and internal power MOSFET drains; requires short, low-inductance routing to minimize EMI and voltage spikes. |
| VIN (Pin 3) | Input supply | Accepts 2.3–4.5 V (up to VOUT – 0.6 V); supports single-cell Li-ion (2.7–4.2 V) and Li-polymer battery inputs. |
| CC (Pin 4) | Constant-current programming & monitor | Resistor-to-ground sets IOUT limit (e.g., 61.9 kΩ = 2 A); capacitor parallel stabilizes loop and enables current sensing. |
| AGND (Pin 5) | Analog ground | Reference for FB, EN, INACT, and internal error amplifiers; must be star-connected to PGND at single point to avoid noise coupling. |
| FB (Pin 6) | Feedback input | Internally tied to VOUT for fixed 5.1-V operation; not user-configurable-no external divider required. |
| EN (Pin 7) | Enable logic input | Active-high (≥1.0 V); must be terminated-floating causes undefined behavior; external pull-down recommended. |
| INACT (Pin 8) | Load status indicator | Open-drain output pulled low when IOUT < 50 mA; signals "no-load" condition to host MCU for power-state management. |
| VOUT (Pin 9) | Regulated output | Delivers stable 5.1 V to USB ports or downstream converters; includes OVP (5.6–5.93 V) and true disconnect in shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable constant output current | Set via external resistor at CC pin (e.g., 124 kΩ = 1 A, 61.9 kΩ = 2 A, 41.2 kΩ = 3 A); enables precise USB port power budgeting. |
| True input-output disconnection | Shuts off both internal FETs in shutdown; eliminates leakage paths and prevents reverse current-critical for battery safety. |
| Integrated pre-charge current limiting | Soft-start phase limits inrush to 0.05–1.7 A (depending on VOUT); avoids tripping source battery protection during cold start. |
| Output current monitoring | Voltage at CC pin proportional to IOUT (VCC = IOUT × RCC / 100,000); enables real-time load telemetry without sense resistor. |
| Thermal and overvoltage protection | 140°C thermal shutdown with 15°C hysteresis + 5.6–5.93 V OVP; prevents damage during sustained overload or adapter fault conditions. |
Applications
| USB Power Bank | USB Type-C DRP Port |
|---|---|
|
Use Scenario: Portable battery pack delivering 5 V/3 A to smartphones and tablets via USB-A or USB-C ports. IC Role / Device Role / Timing Role: Primary synchronous boost regulator providing fixed 5.1-V output with programmable current limit and load-status signaling. Use Value: Eliminates need for external load switch and current-sense amplifier; reduces BOM count by 4–6 components while maintaining USB-IF voltage tolerance. |
Use Scenario: Dual-role port (DRP) in portable monitors or docking stations requiring 5 V bus power negotiation and delivery. IC Role / Device Role / Timing Role: Constant-voltage/constant-current source enabling USB PD sink negotiation and fallback 5 V/3 A delivery. Use Value: INACT pin signals host controller when load disconnects, enabling fast role swap and dynamic power path reconfiguration. |
| Battery-Powered USB Hub | Tablet PC Charging Circuit |
|
Use Scenario: 4-port USB hub powered by internal Li-ion battery, supplying 5 V to peripherals without AC adapter. IC Role / Device Role / Timing Role: High-efficiency boost stage converting 3.6 V battery to regulated 5.1 V with <10 µA quiescent draw in idle state. Use Value: Extends battery runtime by >18% vs. legacy boost ICs; PFM mode maintains >85% efficiency down to 50 mA load. |
Use Scenario: Onboard charging circuit in 10-inch Android tablet, powering USB OTG accessories and display interfaces. IC Role / Device Role / Timing Role: Secondary power rail generator supporting OTG host mode with current-limited, short-circuit-protected 5 V output. Use Value: Internal 9.5-A valley-current limit prevents latch-up during hot-plug events; thermal shutdown protects SoC during sustained accessory loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61236RWLT | Adjustable output (2.9–5.5 V) via external FB divider; identical pinout, package, and CC functionality. | Required where variable VOUT or USB PD PPS compatibility is needed; not drop-in for fixed 5.1-V systems. | Select TPS61236RWLT only if adjustable output voltage is mandatory; otherwise TPS61235RWLT simplifies design with zero-resistor feedback. |
| MT9700A-5.0 | Fixed 5.0-V output, 3.5-A max, 1.2-MHz switching, but lacks CC programming, INACT signal, and true shutdown disconnect. | Suitable for basic boost needs without current regulation or system telemetry; lower integration level. | Choose MT9700A-5.0 only for cost-sensitive, non-USB-compliant applications where constant-current control and load status are unnecessary. |
Compared with TPS61236RWLT, the TPS61235RWLT saves board space and BOM cost by eliminating feedback resistors, while MT9700A-5.0 trades away critical USB power delivery features-including programmable current limit, load-status indication, and true input-output isolation-to achieve lower unit price.
Availability
TPS61235RWLT is available at Aetrix Electronics and suitable for USB power banks, battery-powered USB hubs, and tablet PC charging circuits requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS61235RWLT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-efficiency DC-DC conversion and battery-powered system solutions.
The TPS6123x product line was designed specifically for high-current, single-cell Li-ion USB power delivery in portable consumer electronics-emphasizing integration, thermal efficiency, and system-level intelligence like current monitoring and load status reporting.
FAQ
What is the exact output voltage tolerance of the TPS61235RWLT?
The TPS61235RWLT delivers a fixed 5.1 V output with ±1.96% tolerance (5.0–5.2 V) in PWM mode at TJ = 25°C. This specification meets USB 2.0/3.0 bus voltage requirements and remains stable across input voltages from 2.7 V to 4.5 V and load currents up to 3.5 A. The TPS61235RWLT does not require external feedback components to maintain this accuracy.
How is constant output current programmed on the TPS61235RWLT?
Constant output current on the TPS61235RWLT is set by connecting a precision resistor between the CC pin (Pin 4) and AGND. For example, a 61.9-kΩ resistor programs a 2-A limit with ±10% accuracy at 25°C. A 10-nF capacitor must be placed in parallel to stabilize the control loop. The TPS61235RWLT uses internal current sensing to regulate IOUT without external shunt resistors.
Does the TPS61235RWLT support true input-output disconnection in shutdown mode?
Yes-the TPS61235RWLT implements true disconnection during shutdown: both internal high-side and low-side MOSFETs are fully turned off, breaking the conductive path between VIN and VOUT. This reduces shutdown current to <1 µA and prevents reverse current flow, satisfying battery safety requirements in portable devices using the TPS61235RWLT.
What is the purpose of the INACT pin on the TPS61235RWLT?
INACT (Pin 8) is an open-drain load-status indicator that pulls low when output current falls below 50 mA. It enables host microcontrollers to detect cable unplug or peripheral removal without polling, reducing system power consumption. In the TPS61235RWLT, this pin supports "Always-On" power bank designs by signaling idle state while maintaining 10-µA quiescent draw.
Can the TPS61235RWLT operate with a 2.5-V input voltage?
No-the TPS61235RWLT has a minimum recommended input voltage of 2.3 V, but its UVLO threshold is 2.2–2.3 V with 125-mV hysteresis. At 2.5 V input, the device may start but cannot sustain regulation into 5.1-V output due to insufficient headroom (VIN must remain ≤ VOUT – 0.6 V per datasheet). Stable operation requires VIN ≥ 2.7 V for reliable USB 5-V delivery using the TPS61235RWLT.
TPS61235RWLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 4.5V
- Voltage - Output (Min/Fixed):
- 5.1V
- Voltage - Output (Max):
- -
- Current - Output:
- 6.5A (Switch)
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-VQFN-HR (2.5x2.5)
TPS61235RWLT FAQ
1.How can I place an order for TPS61235RWLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61235RWLT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS61235RWLT reliable?
The price and inventory of TPS61235RWLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61235RWLT is usually 5 days.
3.What payment methods are accepted for TPS61235RWLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61235RWLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61235RWLT?
TPS61235RWLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61235RWLT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS61235RWLT?
For technical support, including TPS61235RWLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61235RWLT requirements.
6.How does Aetrix verify that TPS61235RWLT is sourced from the original manufacturer or authorized distributors?
All TPS61235RWLT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS61235RWLT meets industry standards.
7.What is the process for return or replacement of TPS61235RWLT?
All TPS61235RWLT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61235RWLT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS61235RWLT part is unused and in its original packaging.
Return procedure for TPS61235RWLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS61235RWLT Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
